Sony SA-WCT290 User manual

SERVICE MANUAL
Sony Corporation
Published by Sony EMCS (Malaysia) PG Tec
US Model
Canadian Model
E Model
Australian Model
SA-WCT290
AEP Model
UK Model
SA-WCT290/WCT291
SA-WCT290/WCT291
ACTIVE SUBWOOFER
9-890-686-01
2017B80-1
© 2017.02
Ver. 1.0 2017.02
• SA-WCT290/WCT291 is the active subwoofer in HT-CT290/CT291.
• All the units included in the HT-CT290/CT291 (SA-CT290/CT291, SA-
WCT290/WCT291, remote control) are required to confirm the opera-
tion of SA-CT290/CT291. Check in advance that you have all the units.
• For the TEST MODE for this unit, refer to the service manual of HT-CT290/CT291.
SPECIFICATIONS
Subwoofer (SA-WCT290/
SA-WCT291)
CH models:
POWER OUTPUT
50 W (at 4 ohms, 100 Hz)
Other models:
POWER OUTPUT (reference)
100 W (per channel at 4 ohms,
100 Hz)
Speaker system
Subwoofer system, Bass reflex
Speaker
130 mm (51/8 in) cone type
Power requirements
US, CND models:
120 V AC, 60 Hz
LA9 models:
110 V – 240 V AC, 50/60 Hz
EA models:
127 V – 240 V AC, 50/60 Hz
Other models:
220 V – 240 V AC, 50/60 Hz
Power consumption
On: 15 W
Standby: 0.5 W or less
Dimensions (w/h/d) (approx.)
170 mm × 342 mm × 362 mm
(63/4in × 131/2in × 143/8in)
(vertical installation)
342 mm × 172 mm × 362 mm
(131/2in × 67/8in × 143/8in)
(horizontal installation)
Mass (approx.)
6.3 kg (13 Ib 15 oz)
Wireless transmitter/
receiver section
Frequency band
2.4 GHz (2.4000 GHz – 2.4835 GHz)
Modulation method
FHSS (Freq Hopping Spread Spectrum)
Design and specifications are subject to change without
notice.
Copyrights and Trademarks
• This system incorporates Dolby* Digital.
* Manufactured under license from Dolby Laboratories.
Dolby, Dolby Audio, and the double-D symbol are
trademarks of Dolby Laboratories.
• The BLUETOOTH®word mark and logos are registered
trademarks owned by Bluetooth SIG, Inc. and any use of
such marks by Sony Corporation is under license. Other
trademarks and trade names are those of their respective
owners.
• This system incorporates High-Definition Multimedia Inter-
face (HDMI™) technology.
The terms HDMI and HDMI High-Definition Multimedia
Interface, and the HDMI Logo are trademarks or registered
trademarks of HDMI Licensing, LLC in the United States
and other countries.
• “BRAVIA” is a trademark of Sony Corporation.
• “PlayStation” is a registered trademark of Sony Computer
Entertainment Inc.
• MPEG Layer-3 audio coding technology and patents
licensed from Fraunhofer IIS and Thomson.
• Windows Media is either a registered trademark or trademark
of Microsoft Corporation in the United States and/or other
countries.
• This product is protected by certain intellectual property
rights of Microsoft Corporation. Use or distribution of such
technology outside of this product is prohibited without a
license from Microsoft or an authorized Microsoft subsidiary.
• “ClearAudio+” is a trademark of Sony Corporation.
• Other system and product names are generally trademarks or
registered trademarks of the manufacturers. ™ and ® marks
are not indicated in this document.
Photo: SA-WCT290 (Black) Photo: SA-WCT290 (White) /
SA-WCT291
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SA-WCT290/WCT291
2
NOTES ON CHIP COMPONENT REPLACEMENT
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples
of a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2 V AC range are suitable. (See
Fig. A)
1.5 kΩ0.15 μF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
SAFETY-RELATED COMPONENT WARNING!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE
WITH MARK 0ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONC-
TIONNEMENT. NE REMPLACER CES COMPOSANTS QUE
PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DON-
NÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
1. SERVICING NOTES ............................................. 3
2. DISASSEMBLY
2-1. Disassembly Flow........................................................... 6
2-2. SUB MAIN Section ........................................................ 6
2-3. SUB MAIN Board .......................................................... 7
2-4. Switching Regulator ....................................................... 8
2-5. SUB KEY Board, Bluetooth Module.............................. 8
2-6. SUB LED Board, Front Panel Assy................................ 9
2-7. Loudspeaker (130mm)-203-11 ....................................... 10
3. TROUBLESHOOTING .......................................... 11
4. DIAGRAMS
4-1. Block Diagram - AMP/PANEL/
POWER SUPPLY Section -............................................ 13
4-2. Printed Wiring Board
- SUB MAIN Board (Component Side) - ....................... 15
4-3. Printed Wiring Board
- SUB MAIN Board (Conductor Side) -......................... 16
4-4. Printed Wiring Board - SUB KEY Board -..................... 17
4-5. Schematic Diagram - SUB KEY Board -........................ 17
4-6. Printed Wiring Board - SUB LED Board - ..................... 18
4-7. Schematic Diagram - SUB LED Board -........................ 18
5. EXPLODED VIEWS
5-1. Back Panel Section ......................................................... 19
5-2. SUB MAIN Section ........................................................ 20
5-3. Speaker Cabinet Section ................................................. 21
6. ELECTRICAL PARTS LIST .............................. 22
TABLE OF CONTENTS
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SA-WCT290/WCT291
3
SECTION 1
SERVICING NOTES
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
• Strong viscosity
Unleaded solder is more viscous (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
NOTE OF PERFORMING THE OPERATION CHECK IN
THE STATE THAT HEAT SINK WAS REMOVED
When performing the operation check in the state that this unit was
disassembled, it is possible to perform the operation check in the
state that heat sink was removed. But don’t perform the operation
check in the long time, and perform the operation check in the
volume state as low as possible.
CAPACITOR ELECTRICAL DISCHARGE PROCESSING
When checking the board, for the electric shock prevention, con-
nect the resistors to both ends of capacitors to discharge the capaci-
tor as shown in the figure below.
Note 1: When the connector that connects the SWITCHING
REGULATOR 3L411L board (US, CND) or SWITCHING
REGULATOR 3L411W board (Except US, CND, E12) or
SWITCHING REGULATOR 3L411W-1 board (E12) to the SUB
MAIN board is disconnected before discharging, completely
finish discharging both boards, and then reconnect the connector.
If discharging is not complete, sparking may occur when
connecting the connector and cause a blown fuse.
Note 2: Be sure to discharge using a resistor of 800 Ωor higher.
(Do not discharge with a 0 Ωresistor)
Discharging at a point where excessive electric current flows
through a fuse may cause the fuse to blow.
C8138
C8140
– SUB MAIN Board (Component Side) –
800 :/
2 W
800 :/
2 W
C201
800 /2 W
– SWITCHING REGULATOR 3L411L Board
(US, CND) (Conductor Side) –
– SWITCHING REGULATOR 3L411W Board
(Except US, CND, E12) (Conductor Side) –
– SWITCHING REGULATOR 3L411W-1 Board
(E12) (Conductor Side) –
MODEL IDENTIFICATION
Distinguish by Part No. and destination code on the rear side of
the subwoofer.
MODEL NUMBER LABEL
– Rear view –
Part No.
Destination code
Model Part No.
SA-WCT290 (Black): US, CND 4-688-018-0[]
SA-WCT290 (Black): AEP 4-688-018-1[]
SA-WCT290 (Black): UK 4-688-018-2[]
SA-WCT290 (Black): RU 4-688-018-3[]
SA-WCT290 (Black): E12 4-688-018-4[]
SA-WCT290 (Black): E3 4-688-018-5[]
SA-WCT290 (Black): EA 4-688-018-6[]
SA-WCT290 (Black): SP 4-688-018-7[]
SA-WCT290 (Black): AUS 4-688-018-9[]
SA-WCT290 (Black): TH 4-688-019-0[]
SA-WCT290 (Black): LA9 4-688-019-2[]
SA-WCT291 : AEP 4-688-020-0[]
SA-WCT291 : UK 4-688-020-1[]
SA-WCT291 : RU 4-688-020-2[]
SA-WCT290 (White): EA 4-693-270-2[]
SA-WCT290 (White): SP 4-693-270-3[]
SA-WCT290 (White): TH 4-693-270-5[]
• Abbreviation
AUS : Australian model
CND : Canadian model
E3 : 240 V AC area in E model
E12 : 220-240 V AC area in E model
EA : Saudi Arabia model
LA9 : Latin-American model
RU : Russian Model
SP : Singapore model
TH : Thai model
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SA-WCT290/WCT291
4
ADVANCE PREPARATION WHEN CONFIRMING OP-
ERATION
All the units included in the HT-CT290/HT-CT291 (SA-CT290/
CT291, SA-WCT290/WCT291, remote control) are required to
confirm the operation of SA-CT290/CT291. Check in advance that
you have all the units.
NOTE OF REPLACING THE IC8104 ON THE SUB MAIN
BOARD AND THE COMPLETE SUB MAIN BOARD
When IC8104 on the SUB MAIN board and the complete SUB
MAIN board are replaced, it is necessary to spread the compound
between the SUB MAIN board and the heat sink.
Spread the compound referring to the figure below.
– SUB MAIN Board (Component Side) –
compound
IC8104
NOTES ON THE WIRELESS CONNECTION (LINK) AFTER
REPAIRS ARE COMPLETE
When the parts below is replaced, the wireless connection (LINK)
of the Bar speaker and Subwoofer will be disconnected.
Before returning repaired products to the customer, follow the pro-
cedure below to LINK the Bar speaker and Subwoofer.
Also, if only the Bar speaker or Subwoofer is brought in for repair
and the parts below are replaced, be sure to inform the customer
when returning the repaired products that the customer must LINK
the Bar speaker and Subwoofer.
(Indicate that the LINK procedure is described in the operating
instructions)
Parts in which the LINK will be disconnected due to re-
placement:
• Complete SUB MAIN board
• BLUETOOTH MODULE (WB116A Y) (Ver C)
Activating wireless transmission between specific units
(Secure Link)
2Hold down CLEAR AUDIO+ for
5 seconds.
The USB and TV indicators flash
two times, then the MOVIE and
MUSIC indicators flash
alternately.
When the Bar Speaker is linked to
the subwoofer, the indicators stop
flashing and the power indicator on
the subwoofer lights up in orange.
If it failed, the indicators light up for
5 seconds. Try again the above
operation.
To deactivate this function, hold
down CLEAR AUDIO+ for
5seconds.
The USB indicator flashes twice.
You can specify the wireless connection
to link the Bar Speaker to the subwoofer
using the Secure Link function. This
function can help prevent interference if
you use multiple wireless products.
1Press LINK on the rear of the
subwoofer.
The power indicator on the
subwoofer flashes in orange.
THE ON/STANDBY INDICATOR FLASHES IN RED
If the power indicator flashes in red,
press Æon the subwoofer to turn
o the power and check whether
the ventilation opening of the
subwoofer is blocked or not.
BOND FIXATION OF ELECTRIC PARTS
When SWITCHING REGULATOR 3L411L board (US, CND) or
SWITCHING REGULATOR 3L411W board (Except US, CND,
E12) or SWITCHING REGULATOR 3L411W-1 board (E12) is
replaced, it is necessary to fix parts to the boards by using a speci-
fied bond without fail.
• Object boards
1. SWITCHING REGULATOR 3L411L board (US, CND)
2. SWITCHING REGULATOR 3L411W board (Except US,
CND, E12)
3. SWITCHING REGULATOR 3L411W-1 board (E12)
• Use bond
Part No. Description
7-600-020-70 ADHESIVE (SC608Z2) 180ML
• Parts position
1. SWITCHING REGULATOR 3L411L board
(US, CND) (page 4)
2. SWITCHING REGULATOR 3L411W board
(Except US, CND, E12) (page 5)
3. SWITCHING REGULATOR 3L411W-1 board
(E12) (page 5)
1. SWITCHING REGULATOR 3L411L board
(US, CND)
– SWITCHING REGULATOR 3L411L board
(US, CND) (Component Side) –
*The portion which applies bond:
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SA-WCT290/WCT291
5
2. SWITCHING REGULATOR 3L411W board
(Except US, CND, E12)
– SWITCHING REGULATOR 3L411W board
(Except US, CND, E12) (Component Side) –
*The portion which applies bond:
3. SWITCHING REGULATOR 3L411W-1 board
(E12)
– SWITCHING REGULATOR 3L411W-1 board
(E12) (Component Side) –
*The portion which applies bond:
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SA-WCT290/WCT291
6
SECTION 2
DISASSEMBLY
• This set can be disassembled in the order shown below.
2-1. DISASSEMBLY FLOW
Note: Follow the disassembly procedure in the numerical order given.
2-2. SUB MAIN SECTION
2Remove the SUB MAIN section
in the direction of the arrow.
5SUB MAIN section
1seven screws
(1) (3.5 u14), TAPPING
3CN8104
(3P)
4CN8103
(4P)
1seven screws
(1) (3.5 u14), TAPPING
– Rear view –
SET
2-4. SWITCHING REGULATOR
(Page 8)
2-5. SUB KEY BOARD,
BLUETOOTH MODULE
(Page 8)
2-2. SUB MAIN SECTION
(Page 6)
2-3. SUB MAIN BOARD
(Page 7)
2-7. LOUDSPEAKER (130mm)-203-11
(Page 10)
2-6. SUB LED BOARD, FRONT PANEL ASSY
(Page 9)
JIG
When disassembling the unit, use the following
jig for speaker removal.
Part No. Description
J-2501-238-A JIG FOR SPEAKER REMOVAL
jomi

SA-WCT290/WCT291
7
:LUHVHWWLQJ
3stopper, wiring
SUB KEY
board
stopper,
wiring
SWITCHING
REGULATOR
SUB MAIN
board
2wire (flat type)
(9 core) (CN8101)
wire (flat type)
(9 core)
4CN8102 (10P)
6heat sink
Note 2: When installing the heat sink, spread
the compound referring to “NOTE OF
REPLACING THE IC8104 ON THE
SUB MAIN BOARD AND THE
COMPLETE SUB MAIN BOARD”
on servicing notes (page 4).
1wire (flat type)
(26 core) (CN8100)
5two screws
(+BVTP 3 u10)
7two screws
(+BVTP 3 u8)
7two screws
(+BVTP 3 u8)
8SUB MAIN board
IC8104
2-3. SUB MAIN BOARD
Note 1: When the complete SUB MAIN board is replaced, refer
to “NOTES ON THE WIRELESS CONNECTION (LINK)
AFTER REPAIRS ARE COMPLETE” on page 4.
jomi

SA-WCT290/WCT291
8
• Abbreviation
CND : Canadian model
E12 : 220-240 V AC area in E model
1two screws
(+BVTP 3 u10)
5one screw
(+BVTP 3 u8)
3one screw
(+BVTP 3 u8)
7BLUETOOTH module
6cushion saranet
4button, SW
2SUB KEY board
2one screw
(+BVTP 3 u8)
3stopper,
wiring
2one screw
(+BVTP 3 u8)
2three screws
(+BVTP 3 u8)
4SWITCHING REGULATOR 3L411W
(EXCEPT US, CND, E12)
SWITCHING REGULATOR 3L411W-1
(E12)
SWITCHING REGULATOR 3L411L
(US, CND)
1CN1 (2P)
2-4. SWITCHING REGULATOR
2-5. SUB KEY BOARD, BLUETOOTH MODULE
Note: When the BLUETOOTH module is replaced, refer to
“NOTES ON THE WIRELESS CONNECTION (LINK) AF-
TER REPAIRS ARE COMPLETE” on page 4.
jomi

SA-WCT290/WCT291
9
Note 1: Please spread a sheet under a
unit not to injure cabinet.
8 panel, front assy
Note 3: When installing the front panel section,
remove the used glue and use a new
glue to fix the front panel section.
4Remove the front panel section
in the direction of the arrow.
5CN8300 (3P)
3 All bosses are removed while moving jig
in the direction of the arrow, and front
panel section is removed.
3 All bosses are removed while
moving jig in the direction of
the arrow, and front panel
section is removed.
2 Insert the jig into a space and raise
front panel section.
Note 2: When using a jig, please work
so as not to injure front panel
section and cabinet.
2 Insert the jig into a space and raise
front panel section.
Note 2: When using a jig, please work
so as not to injure front panel
section and cabinet.
total eight bosses
– Bottom view –
1Insert a jig in two notches of bottom
of the unit, and lift the front panel section a little.
6two screws
(+BVTP 3 u8)
7SUB LED board
2-6. SUB LED BOARD, FRONT PANEL ASSY
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SA-WCT290/WCT291
10
2-7. LOUDSPEAKER (130mm)-203-11
1four screws
(1) (3.5 u16), TAPPING
4loudspeaker (130mm)-203-11
2Remove the loudspeaker
(130mm)-203-11
in the direction of the arrow.
– Bottom view –
loudspeaker
(130mm)-203-11
:LUHVHWWLQJ
 ,QVWDOODWLRQGLUHFWLRQIRUWKHORXGVSHDNHU
(130mm)-203-11
terminals position
terminal
(wide side)
terminal
(narrow side)
3 terminal
(narrow side)
3 terminal
(wide side)
Note: When installing the loudspeaker
(130mm)-203-11, make sure that there
is a position of the speaker terminal to the
position shown in the figure below.
jomi

SA-WCT290/WCT291
11
SECTION 3
TROUBLESHOOTING
1. ON/STANDBY lamp LED flashes in red (PROTECT) Note: Do not set volume MIN 2. ON/STANDBY lamp LED does not light up after AC in (Power is not turned on)
ON/STANDBY lamp LED flashes in red. (PROTECT)
ON/STANDBY lamp LED does not flash in red, when removing the speaker and turning the power on.
Disconnect R8165. Check PVDD_STBY at CN8100 pin 18 is high (3.3V)
Check if IC8104 pin 35, 39, 40 is short to GND.
Check CN8102 pin 1, 2, 3 and 7 is PVDD_24V
Remove SWITCHING REGULATOR wire at CN8102 and check PVDD24V short to GND (only 18V)
Replace the IC8104 on the SUB MAIN board.
Yes Yes
No
Check and replace the speaker.
No Replace Bluetooth
module.
NoNo No
No
Check IC8001 pin 1 is 12V Check CL8006 is D3.3V
Yes
Replace SUB MAIN board. Replace IC8001.
No Check unsw3.3V R8033. No Replace SUB MAIN board.
Yes
Replace SWITCHING REGULATOR board.
Yes
Yes Yes
ON/STANDBY lamp LED does not light up. (Power is not turned on) The voltage of the following is 18V or 24V. SWITCHING REGULATOR 3L411L or 3L411W or 3L411W-1: Connector (CN101) pin 1 to 3 and pin 7. The voltage of the following is 3.3V. SUB MAIN board: Connector (CN8101) pin 7.
Yes Yes Yes
Replace the Bluetooth Module.
Replace SWITCHING REGULATOR 3L411L or 3L411W or 3L411W-1.
No
No Replace SUB MAIN board.
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SA-WCT290/WCT291
12
3. The sound is not outputted
Yes
Replace Bluetooth Module in subwoofer and check sound
The waveform of the following is inputted. SUB MAIN board: IC8103 pin 27 IC8103 pin 23 IC8103 pin 22 The signal of the following is outputted. SUB MAIN board: IC8104 pin 39 IC8104 pin 40 IC8104 pin 35
Replace Bluetooth Module in sound bar
Yes
Replace IC8104 on SUB MAIN board.
Yes Yes
No No
The signal of the following is inputted. SUB MAIN board: IC8104 pin 5 IC8104 pin 6
Replace IC8103 on SUB MAIN board.
No No
The sound is not outputted. Check the contact between connector (CN8103) on the SUB MAIN board and speaker cable. Check the contact between speaker and speaker cable.
jomi

SA-WCT290/WCT291
SA-WCT290/WCT291
1313
48
37
BLUETOOTH
MODULE
I2S_SDO
I2S_SCLK
I2S_LRCLK
TAS_RESET_N
SDA
SCL
MUTE
TAS_XPDN
TAS_SD
KEY_PAIR
BT_BOOT
AC_CUT
PCONT
LED0
LED1
X001
12.288MHz
OUT
STREAM PROCESSOR
IC8103
MCLK11 49
PWM_P_4
27
23
22
20
21
19
18
16
SDIN4
SCLK
LRCLK
SDA
SCL
MUTE
PDN
RESET
PWM_M_4
VALID
OUT_B
FAULT OTW
OUT_A
OUT_A
DIGITAL POWER AMP
IC8104
INPUT_A
INPUT_B
RESET
35
39
40
5
6
4
16 17
L8102
L8103
SUBWOOFER
SWITCHING REGULATOR
3L411W-1
(E12)
SWITCHING REGULATOR
3L411W
(EXCEPT US, CND, E12)
SWITCHING REGULATOR
3L411L
(US, CND)
6LJQDOSDWK
: AUDIO (ANALOG)
: AUDIO (DIGITAL)
5FKLVRPLWWHGGXHWR
VDPHDV/FK
TO AMP PVDD_24V
+24V
SUB_24V
(AC IN)
VOLTAGE DETECT
IC8102
OUT VDD
S8200
S8201
POWER SWITCH
Q8102 2
4
+3.3V REG.
IC8000
+12V REG.
IC8001
VIN
SW 2
3
+3.3V
POWER CONTROL
Q8001
POWER CONTROL
Q8000
+3.3V
LED DRIVE
Q8101
D8300
+12V VIN
ON/OFF
VOUT
16
3
LINK
1
4-1. BLOCK DIAGRAM - AMP/PANEL/POWER SUPPLY Section -
SECTION 4
DIAGRAMS
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SA-WCT290/WCT291
SA-WCT290/WCT291
1414
For Schematic Diagrams.
Note:
• All capacitors are in μF unless otherwise noted. (p: pF)
50 V or less are not indicated except for electrolytics and
tantalums.
• All resistors are in Ωand 1/4 W or less unless otherwise
specified.
• f: Internal component.
• 2: Nonflammable resistor.
• 5: Fusible resistor.
• C: Panel designation.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
• A: B+ Line.
• Voltages and waveforms are dc with respect to ground
in wireless connection to the bar speaker (SA-CT380/
CT381).
no mark : POWER ON
• Voltages are taken with VOM (Input impedance 10 M).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F: AUDIO (ANALOG)
J: AUDIO (DIGITAL)
For Printed Wiring Boards.
Note:
• X: Parts extracted from the component side.
• Y: Parts extracted from the conductor side.
• f: Internal component.
• : Pattern from the side which enables seeing.
(The other layers’ patterns are not indicated.)
Caution:
Pattern face side:
(Conductor Side)
Parts face side:
(Component Side)
Parts on the pattern face side seen
from the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
• Indication of transistor.
C
B
These are omitted.
E
Q
• Abbreviation
AUS : Australian model
CND : Canadian model
E3 : 240 V AC area in E model
E12 : 220-240 V AC area in E model
EA : Saudi Arabia model
LA9 : Latin-American model
RU : Russian Model
SP : Singapore model
TH : Thai model
• Abbreviation
AUS : Australian model
CND : Canadian model
E3 : 240 V AC area in E model
E12 : 220-240 V AC area in E model
EA : Saudi Arabia model
LA9 : Latin-American model
RU : Russian Model
SP : Singapore model
TH : Thai model
Note: The components identified by mark 0or
dotted line with mark 0are critical for safety.
Replace only with part number specified.
Note: Les composants identifiés par une marque
0sont critiques pour la sécurité.
Ne les remplacer que par une piéce portant
le numéro spécifié.
Note: When the complete SUB MAIN board is replaced,
refer to “NOTE OF REPLACING THE IC8104 ON
THE SUB MAIN BOARD AND THE COMPLETE SUB
MAIN BOARD” and “NOTES ON THE WIRELESS
CONNECTION (LINK) AFTER REPAIRS ARE
COMPLETE” on page 4.
jomi

SA-WCT290/WCT291
SA-WCT290/WCT291
1515
1
A
B
C
D
E
F
G
H
I
J
K
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
R8240
X001
JL8100
JL8101
JL8102
JL8103
JL8104
JL8105
JL8106
JL8107
JL8108
JL8109
JL8110
JL8111
JL8112
JL8113
CL8146
2
19
8
CN8101
110
11 12
CN8102
14
56
CN8103
13
54
CN8104
C8101
C8102
C8103
C8104
Q8101
C8106
Q8102
C8107
C8108
C8109
C8110
C8112
C8113
C8114
C8115
C8119 C8120 C8121
C8122
C8123
C8124
D8100
C8125
C8126 C8127 C8128
C8129
R8101
R8102
R8103
CL8180
CL8181
R8105
CL8182
R8106
CL8183
C8130
R8108
CL8184
C8131
R8109
C8132
IC8102
C8133
C8134
C8135
C8136
C8137
C8138
R8110
C8139
R8111
R8112
C8140
R8118
C8141
R8119
C8142
C8143 C8144
C8145
C8146
C8147
L8003
C8148
L8004
R8121
R8122
R8123
R8124 R8125
R8126
R8133
R8134
R8135
R8136
R8137
FB8238
R8138
C8160
R8139
C8164
C8165
C8166
R8140 R8141
C8171
C8172
R8154
R8158
R8159
JC8107
JC8108
JC8109
R8161
R8162
R8163
R8164
JC8110
R8165
R8166
R8167
R8168
R8169
JC8115 JC8116
R8170
R8171
R8172
R8173
R8174
R8175
R8176
CL8003
CL8004
CL8006
R8181R8182
R8189
R8190
R8191
R8192
JL8001
Q8000 E
E
AK
Q8001
C8008
C8016
C8017
C8018
C8019
C8020
C8021
C8022
C8023
FB8105
FB8106
IC8000
IC8001
R8010
R8011
R8012
R8208
C8237
R8026
R8028
L8101
R8029
R8030
R8031
R8033
R8229
R8035
R8037
R8038
R8039
R8232
R8041
R8042
1
2
25
26
CN8100
C8238
128
29
56
IC8103
L8103
L8102
C8028
FB8239
44
22
23
1
IC8104
11
(11)
1-981-464-
SUB MAIN BOARD
(COMPONENT SIDE)
SUBWOOFER
(CHASSIS)
(CHASSIS)
SUB KEY BOARD
CN8200
(Page 17)
>001P
CONNECT TO
SWITCHING REGULATOR 3L411W
(EXCEPT US, CND, E12)
SWITCHING REGULATOR 3L411W-1
(E12)
SWITCHING REGULATOR 3L411L
(US, CND)
~ AC IN
CONNECT TO
BLUETOOTH
MODULE
SUB LED BOARD
CN8300
(Page 18)
>002P
4-2. PRINTED WIRING BOARD - SUB MAIN Board (Component Side) - • : Uses unleaded solder.
Note: When the complete SUB MAIN board is replaced, refer to
“NOTE OF REPLACING THE IC8104 ON THE SUB MAIN
BOARD AND THE COMPLETE SUB MAIN BOARD” and
“NOTES ON THE WIRELESS CONNECTION (LINK)
AFTER REPAIRS ARE COMPLETE” on page 4.
jomi

SA-WCT290/WCT291
SA-WCT290/WCT291
1616
1
A
B
C
D
E
F
G
H
I
J
K
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
CL8105
CL8106
CL8107
CL8112
CL8113
CL8125
CL8127
CL8128
CL8129
CL8130
CL8131
CL8132
CL8133
CL8134
CL8142
CL8143
CL8144
CL8145
CL8147
CL8148
CL8149
CL8150
CL8151
CL8152
CL8153
CL8156
CL8157
CL8159
CL8168 CL8169
CL8170
CL8171
CL8172
CL8173
CL8174
CL8175
CL8176
CL8177
CL8178
CL8179
CL8001
SUB MAIN BOARD
(CONDUCTOR SIDE)
11
(11)
1-981-464-
4-3. PRINTED WIRING BOARD - SUB MAIN Board (Conductor Side) - • : Uses unleaded solder.
Note: When the complete SUB MAIN board is replaced, refer to
“NOTE OF REPLACING THE IC8104 ON THE SUB MAIN
BOARD AND THE COMPLETE SUB MAIN BOARD” and
“NOTES ON THE WIRELESS CONNECTION (LINK)
AFTER REPAIRS ARE COMPLETE” on page 4.
jomi

SA-WCT290/WCT291
SA-WCT290/WCT291
1717
1
A
B
C
D
E
F
G
H
I
J
K
2345678
R8250
C8200
R8251
2
17
6
CN8201
C8201
S8200
S8201
91
10 11
CN8200
CL8204
CL8202
CL8205
CL8207
CL8206
CL8208
CL8201
CL8200
CL8203
SUB KEY BOARD
(COMPONENT SIDE)
SUB KEY BOARD
(CONDUCTOR SIDE)
SUB MAIN BOARD
CN8101
(Page 15)
>001P
11
(11)
1-981-465-
11
(11)
1-981-465-
FOR
SERVICE USE
4-4. PRINTED WIRING BOARD - SUB KEY Board - • : Uses unleaded solder. 4-5. SCHEMATIC DIAGRAM - SUB KEY Board -
1
A
B
C
D
E
F
G
H
I
J
K
2 3 4 5 6 78
SUB KEY BOARD
0.1u
C8201
0.1u
C8200
CL8207
CL8208
CL8203
CL8205
CL8200
CL8201
CL8202
CL8204
CL8206
7P
CN8201
3.3V1
D_GND2
UART_RX3
PCONT4
UART_TX5
BT_BOOT6
SDA7
0
R8251
0
R8250
S8201
S8200
9P
CN8200
1
KEY_POWER
2KEY_PAIR
3UNSW3.3V
4D_GND
5UART_RX
6PCONT
7UART_TX
8BT_BOOT
9SDA
1
LINK
FOR
SERVICE USE
SUB MAIN BOARD
CN8101
jomi

SA-WCT290/WCT291
SA-WCT290/WCT291
1818
4-6. PRINTED WIRING BOARD - SUB LED Board - • : Uses unleaded solder. 4-7. SCHEMATIC DIAGRAM - SUB LED Board -
1
A
B
C
D
E
F
G
H
I
J
K
2345678
CL8301
CL8300
CL8302
D8300
R8301
31
4
5
CN8300
R8300
SUB LED BOARD
(COMPONENT SIDE)
SUB LED BOARD
(CONDUCTOR SIDE)
SUB MAIN BOARD
CN8104
(Page 15)
>002P
12
(12)
1-980-504-
12
(12)
1-980-504-
1
A
B
C
D
E
F
G
H
I
J
K
2 3 4 5 6 78
SUB LED BOARD
CL8301
CL8300
CL8302
3P
CN8300
1LED(G)
2LED(R)
3GND
RED
GRN
CL-165HR/HG5-D-T
D8300
100
R8301
470
R8300
SUB MAIN BOARD
CN8104
jomi

19
SA-WCT290/WCT291
SECTION 5
EXPLODED VIEWS
Note:
• -XX and -X mean standardized parts, so
they may have some difference from the
original one.
• Items marked “*” are not stocked since
they are seldom required for routine ser-
vice. Some delay should be anticipated
when ordering these items.
• The mechanical parts with no reference
number in the exploded views are not sup-
plied.
• Color Indication of Appearance Parts Ex-
ample:
KNOB, BALANCE (WHITE) . . . (RED)

Parts Color Cabinet’s Color
• Abbreviation
AUS : Australian model
CND : Canadian model
E3 : 240 V AC area in E model
E12 : 220-240 V AC area in E model
EA : Saudi Arabia model
LA9 : Latin-American model
RU : Russian Model
SP : Singapore model
TH : Thai model
5-1. BACK PANEL SECTION
• Rear view
1 4-874-614-12 SCREW (1) (3.5X14), TAPPING 2 2-682-469-11 FOOT (SW) (4 pieces, 1 set)
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
1
1
2
speaker cabinet section
SUB MAIN section
The components identified by mark 0
or dotted line with mark 0are critical for
safety.
Replace only with part number specified.
Les composants identifiés par une marque
0sont critiques pour la sécurité.
Ne les remplacer que par une pièce por-
tant le numéro spécifié.
jomi

20
SA-WCT290/WCT291
A
ns
53
55
A
51
57
56
58
59
52
54
#1
#1
#1
#1
#3
#1
#1
#1
#2
#2
#2
#2
#1
ns ns
SUB KEY board
(ns)
ns
ns
ns ns
ns
ns
#3
5-2. SUB MAIN SECTION
Note 1: When the complete SUB MAIN board is replaced, refer to
“NOTE OF REPLACING THE IC8104 ON THE SUB MAIN
BOARD AND THE COMPLETE SUB MAIN BOARD” and
“NOTES ON THE WIRELESS CONNECTION (LINK) AF-
TER REPAIRS ARE COMPLETE” on page 4.
Note 2: If wire (flat type) is replaced, install it after bending it in the
same form as that before replacement.
Note 3: When the BLUETOOTH module is replaced, refer to
“NOTES ON THE WIRELESS CONNECTION (LINK)
AFTER REPAIRS ARE COMPLETE” on page 4.
Note 4: When the SWITCHING REGULATOR board is replaced,
spread the bond referring to “BOND FIXATION OF
ELECTRIC PARTS” on page 4.
51 1-828-256-61 WIRE (FLAT TYPE) (26 CORE)
52 A-2165-316-A SUB MAIN BOARD, COMPLETE (for SERVICE)
(for Black model) (WCT290: US, CND)
52 A-2165-413-A SUB MAIN BOARD, COMPLETE (for SERVICE)
(for Black model) (WCT290: AEP)
52 A-2165-424-A SUB MAIN BOARD, COMPLETE (for SERVICE)
(for Black model) (WCT290: UK)
52 A-2165-434-A SUB MAIN BOARD, COMPLETE (for SERVICE)
(for Black model) (WCT290: SP)
52 A-2165-444-A SUB MAIN BOARD, COMPLETE (for SERVICE)
(for Black model) (WCT290: E12)
52 A-2165-510-A SUB MAIN BOARD, COMPLETE (for SERVICE)
(for White model) (WCT291: AEP)
52 A-2165-520-A SUB MAIN BOARD, COMPLETE (for SERVICE)
(for White model) (WCT291: UK)
52 A-2166-007-A SUB MAIN BOARD, COMPLETE (for SERVICE)
(for Black model) (WCT290: LA9)
52 A-2180-393-A SUB MAIN BOARD, COMPLETE (for SERVICE)
(for Black model) (WCT290: RU)
52 A-2180-415-A SUB MAIN BOARD, COMPLETE (for SERVICE)
(for Black model) (WCT290: EA)
52 A-2180-421-A SUB MAIN BOARD, COMPLETE (for SERVICE)
(for Black model) (WCT290: AUS)
52 A-2180-427-A SUB MAIN BOARD, COMPLETE (for SERVICE)
(for Black model) (WCT290: TH)
52 A-2180-433-A SUB MAIN BOARD, COMPLETE (for SERVICE)
(for Black model) (WCT290: E3)
52 A-2180-443-A SUB MAIN BOARD, COMPLETE (for SERVICE)
(for White model) (WCT291: RU)
52 A-2180-545-A SUB MAIN BOARD, COMPLETE (for SERVICE)
(for White model) (WCT290: LA9)
52 A-2180-551-A SUB MAIN BOARD, COMPLETE (for SERVICE)
(for White model) (WCT290: SP)
52 A-2180-570-A SUB MAIN BOARD, COMPLETE (for SERVICE)
(for White model) (WCT290: EA)
52 A-2180-576-A SUB MAIN BOARD, COMPLETE (for SERVICE)
(for White model) (WCT290: TH)
53 1-828-308-61 WIRE (FLAT TYPE) (9 CORE)
054 1-474-674-11 SWITCHING REGULATOR 3L411W
(EXCEPT US, CND, E12)
054 1-474-674-21 SWITCHING REGULATOR 3L411W-1 (E12)
054 1-474-674-31 SWITCHING REGULATOR 3L411L (US, CND)
55 1-493-097-41 BLUETOOTH MODULE
56 4-582-118-01 BUTTON, SW
57 4-581-865-01 COVER, BACK
058 4-966-267-12 BUSHING (FBS001), CORD
059 1-834-966-42 POWER-SUPPLY CORD (AEP, RU, E3, SP, LA9)
059 1-835-068-21 CORD, POWER (AUS)
059 1-837-308-12 CORD, POWER-SUPPLY (US, CND)
059 1-839-940-21 POWER-SUPPLY CORD (TH)
059 1-839-999-22 POWER-SUPPLY CORD (UK, EA3, EA)
059 1-848-053-12 POWER-SUPPLY CORD (E12)
#1 7-685-646-71 SCREW +BVTP 3X8 TYPE2 IT-3
#2 7-685-646-79 SCREW +BVTP 3X8 TYPE2 IT-3
#3 7-685-647-79 SCREW +BVTP 3X10 TYPE2 IT-3
ns not supplied
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
jomi